Journal
OPTICAL MATERIALS EXPRESS
Volume 7, Issue 2, Pages 633-640Publisher
OPTICAL SOC AMER
DOI: 10.1364/OME.7.000633
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High-aspect-ratio plasmonic nanogratings are promising for applications such as infrared (IR) polarimetric detectors and IR emitters. Direct fabrication using conventional photolithography is necessary for their integration with other semiconductor devices. Nanogrooves with a high aspect ratio of 15 and a width of 100 nm were developed using a tapered-sidewall mold technique. Calculations and experimental measurements demonstrated that they have a strong wavelength-and polarization-selective absorption profile that is defined mainly by the groove depth, and that the FWHM of the absorbance can be controlled by the grating period. This study will contribute to the development of thermal polarimetric imaging and thermal emitters for gas sensing. (C) 2017 Optical Society of America
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